Movement guide
Flexor pollicis brevis
Bends the thumb at its large knuckle.
01
Thumb putty press
Thumb flexion · Soft putty
Also works
Flexor pollicis longus, other thenar muscles
How to perform +
Press your thumb into soft putty toward the palm, then release.
Keep the thumb joints aligned; do not force the end position.
Example volume · 1–2 sets × 8–12 gentle reps